Detent-lever for gas-engines.



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DETENT LEVER FOR GAS ENGINES.

APPLICATION FILED JULY 8, 1910.

1,000,355, Patented Aug. 8, 1911. 0

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GPILUMIA PLANDORAPH C0" WASHINOTOK, D. C.

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' DETENT LEVER FOB GAS ENGINES.

APPLICATION FILED JULY 8, 1910.

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pairs STATES PATENT onmon.

GEORGE HERBERT BRIGGS, OF DE KALB, ILLINOIS, ASSIGNOR TO JACOB HAISHCOMPANY, OF DE KALB, ILLINOIS.

DETENT-LEVER FOR GAS-ENGINES.

Specification of Letters Patent.

Patented Aug. 8, 1911.

To all whom it may concern:

Be it known that I, GEORGE HERBERT Emacs, a citizen of the UnitedStates, residing at De Kalb, in the county of Dekalb and State ofIllinois, have invented certain new and useful Improvements in Detent-Levers for Gas-Engines, of which the following is a specification. 1

My invention has reference to detent mechanism for gasolene engines, ofthat class wherein the speed of the engine is controlled by acentrifugal governor.

The principal purpose of my device is to regulate such control so thatthe action of the governor will be imparted to the operating parts ofthe engine more or less quickly, as desired.

In the accompanying drawings, Figure 1 is a plan view of an engine inwhich my invention is embodied. Fig. 2 is a side elevation of my device.Fig. 3 is a plan View thereof. Fig. 4 is an elevation thereof from theinner side, with some of the parts broken away. Fig. 5 is a detail View,showing the roller-arm in longitudinal section.

Similar parts are indicated by corresponding numbers of referencethroughout the several figures.

1 represents the cylinder of the engine, 2 the piston thereof, and 3 thecrank-shaft, upon the ends of which are balance-wheels 4. One of thewheels 4 is provided with the usual hub governor 5, engaging .a collar 6on the shaft 3, and adapted to move such collar longitudinally of theshaft.

Slidably mounted on the side of the engine is a rod 7, connected at oneof its ends with a lever 8, adapted to actuate the exhaust valve of theengine. At its opposite end the rod 7 is provided with a roller 9,actuated by a cam 10 on a shaft 11 mounted on the frame of the engine.On the inner end of the shaft 11 is a gear-wheel 12, actuated by agear-wheel 13'on the shaft 3. Upon the rotation of the shaft 3 movementis thus imparted to the rod 7 to cause a reciprocating movement thereof,and intermittently open the exhaust valve of the engine.

Fixed to the frame of the engine is a bracket 14, upon which ispivotally supported a detent lever 15, provided with a finger 16, inproximity to the inner end of the rod 7 and normally out of engagementwith a pin 17 projecting outwardly from such rod.

Rotatably mounted on a pin 18 fixed in the lever 15 is a r0ller-arm 19,in the outer end of which is eccentrically held a pin 20, carrying asmall roller 21, adapted to be engaged by a flange 22 on the collar 6.The outward movement of such collar operates to move the detent finger16 inwardly, causing the end thereof to engage the pin 17, preventingthe return movement of the rod 7, and holding the exhaust valve of theengine open. Upon the collar 6 being again moved inwardly upon the shaft3 the detent finger is permitted to return to its former position, suchreturn movement being effected by means of a spring 23, secured at oneend to the engine and at the opposite end to a post 24 on the lever 15.

Fulcrumed on the detent lever 15 is a lever 25, having a short arm 26,provided on its inner face with an arc-shaped rack 27, engaging a pinion28 on the inner end of the roller-arm 19. The movement of the lever 25operates to rotate the roller-arm, and change the position of the pin 20with reference to the longitudinal center of the rollerarm. The apparentresult is to move the pin 20 away from or toward the flange 22, but asthe roller 21 on such pin is at all times in contact with said flange,the real efiect is the movement of the detent finger 16 toward the arm7, or away therefrom. It will be apparent that when the roller-arm 19 isturned so as to bring the pin 20 on the inner side thereof, as shown inFig. 3, thedetent lever will engage the pin 17 more quickly than whenthe pin 20 is turned to a more outward position on such roller-arm.

Mounted on the detent-lever 15, adjacent to the lever 25, is an arch 29,having a series of indentations 30, adapted to be engaged by a pin 31 ina socket 32 on the inner face of the lever 25. The engagement of the pin31 with said indentations is suflicient to holdthe lever 25 in theadjusted positions in which it may be placed, but will not interferewith the movement of the lever by the application of force thereto. I

By the means just described the lever 25 is capable of being held inadjusted positions, with the roller-arm 19 in position with the pin 20on the inner side thereof, or on the outer side, or at pointsintermediate thereof, as desired.

Accidental release of the pin 31 from the indentations in the arch 29 isprevented by a coiled spring 33 in the socket 32, which spring does notinterfere with the movementof' thelever 25 upon application of force 2.A device of the class named, comprising a pivotally supported lever,provided at one end with a detent finger; a roller-arm, forming theshort end of said lever, and pro videdat its outer end with aneccentrically mounted pin; a gear pinion integral with said roller-arm;a hand lever, fulcrumed on said detent lever, and provided on its shortend with a rack-gear adapted to actuate said gear pinion; and means forholding said hand-lever in adjusted positions.

3. A device of the class named, comprising a pivotally supported lever,provided at one end with a detent finger; a roller-arm forming the shortend of said lever, and provided. at its outer end with an eccentricallymounted pin; a hand lever, fulcrumed on said detent lever; an arch,mounted on said detent lever, and provided on one of its faces with aseries of indentations; a spring-controlled pin, supported on saidhand-lever, and adapted to severally engage said indentations, and meansfor imparting the movement of said handlever to said roller-arm, torotate the same.

4. In combination with the crank-shaft of a gasolene engine, and collar,slidably mount- .ed thereon; a rotatable roller-arm, having contact withsaid collar eccentrically of the,

axis of such roller arm; a detent-lever, adapted to be actuated by saidroller-arm; means for holding said roller-arm in contact with saidcollar; means for holding said roller-arm in adjusted positions; andgovernor mechanism adapted to suitably actuate said collar.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE HERBERT BRIGGS.

Witnesses:

SIMO JOHNSON, CARL BARINE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). C. V

